Cold Brew Coffee Ratio Calculator — Perfect Concentrate Every Time
Calculate the perfect coffee to water ratio for cold brew concentrate or ready-to-drink.
☕ Cold Brew Calculator
Coffee needed (ground)
125g
≈ 12 tbsp
Yield after steeping
950ml
≈ 4 cups
Cold Brew Ratio Guide
| Style | Coffee:Water | Per 1L Water |
|---|---|---|
| Concentrate | 1:4 | 250g / litre |
| Strong RTD | 1:6 | 167g / litre |
| Standard RTD | 1:8 | 125g / litre |
| Light RTD | 1:10 | 100g / litre |
Frequently Asked Questions
What is the best coffee-to-water ratio for cold brew?
The most common ratio is 1:8 (1 gram of coffee per 8ml of water) for ready-to-drink cold brew. For concentrate (to dilute before serving), use 1:4. Adjust based on your taste preference.
How long should cold brew steep?
Most cold brew recipes steep for 12–24 hours in the refrigerator. 16–18 hours is the sweet spot for a smooth, balanced flavour. Longer steeping (20–24 hours) produces a stronger, slightly more bitter result.
What grind size should I use for cold brew?
Use a coarse grind — similar to French press. Fine grinds over-extract, creating bitter cold brew. The coarse grind also makes filtering easier.
Can I make cold brew at room temperature?
Yes. Room temperature cold brew steeps faster — usually 8–12 hours. Refrigerator steeping takes longer (12–24 hours) but produces a cleaner, smoother flavour and is safer from a food safety perspective.